1 /*- 2 * Copyright (c) 1997, Stefan Esser <se@freebsd.org> 3 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org> 4 * Copyright (c) 2000, BSDi 5 * Copyright (c) 2003, Thomas Moestl <tmm@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/kernel.h> 36 #include <sys/libkern.h> 37 #include <sys/module.h> 38 #include <sys/pciio.h> 39 40 #include <dev/ofw/ofw_bus.h> 41 #include <dev/ofw/ofw_bus_subr.h> 42 #include <dev/ofw/ofw_pci.h> 43 #include <dev/ofw/openfirm.h> 44 45 #include <machine/bus.h> 46 #include <machine/intr_machdep.h> 47 #include <machine/resource.h> 48 49 #include <dev/pci/pcireg.h> 50 #include <dev/pci/pcivar.h> 51 #include <dev/pci/pci_private.h> 52 53 #include "pcib_if.h" 54 #include "pci_if.h" 55 56 typedef uint32_t ofw_pci_intr_t; 57 58 /* Methods */ 59 static device_probe_t ofw_pcibus_probe; 60 static device_attach_t ofw_pcibus_attach; 61 static pci_assign_interrupt_t ofw_pcibus_assign_interrupt; 62 static ofw_bus_get_devinfo_t ofw_pcibus_get_devinfo; 63 static int ofw_pcibus_child_pnpinfo_str_method(device_t cbdev, device_t child, 64 char *buf, size_t buflen); 65 66 static void ofw_pcibus_enum_devtree(device_t dev, u_int domain, u_int busno); 67 static void ofw_pcibus_enum_bus(device_t dev, u_int domain, u_int busno); 68 69 static device_method_t ofw_pcibus_methods[] = { 70 /* Device interface */ 71 DEVMETHOD(device_probe, ofw_pcibus_probe), 72 DEVMETHOD(device_attach, ofw_pcibus_attach), 73 74 /* Bus interface */ 75 DEVMETHOD(bus_child_pnpinfo_str, ofw_pcibus_child_pnpinfo_str_method), 76 77 /* PCI interface */ 78 DEVMETHOD(pci_assign_interrupt, ofw_pcibus_assign_interrupt), 79 80 /* ofw_bus interface */ 81 DEVMETHOD(ofw_bus_get_devinfo, ofw_pcibus_get_devinfo), 82 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 83 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 84 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 85 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 86 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 87 88 { 0, 0 } 89 }; 90 91 struct ofw_pcibus_devinfo { 92 struct pci_devinfo opd_dinfo; 93 struct ofw_bus_devinfo opd_obdinfo; 94 }; 95 96 static devclass_t pci_devclass; 97 98 DEFINE_CLASS_1(pci, ofw_pcibus_driver, ofw_pcibus_methods, 99 sizeof(struct pci_softc), pci_driver); 100 DRIVER_MODULE(ofw_pcibus, pcib, ofw_pcibus_driver, pci_devclass, 0, 0); 101 MODULE_VERSION(ofw_pcibus, 1); 102 MODULE_DEPEND(ofw_pcibus, pci, 1, 1, 1); 103 104 static int 105 ofw_pcibus_probe(device_t dev) 106 { 107 108 if (ofw_bus_get_node(dev) == -1) 109 return (ENXIO); 110 device_set_desc(dev, "OFW PCI bus"); 111 112 return (0); 113 } 114 115 static int 116 ofw_pcibus_attach(device_t dev) 117 { 118 u_int busno, domain; 119 int error; 120 121 error = pci_attach_common(dev); 122 if (error) 123 return (error); 124 domain = pcib_get_domain(dev); 125 busno = pcib_get_bus(dev); 126 127 /* 128 * Attach those children represented in the device tree. 129 */ 130 131 ofw_pcibus_enum_devtree(dev, domain, busno); 132 133 /* 134 * We now attach any laggard devices. FDT, for instance, allows 135 * the device tree to enumerate only some PCI devices. Apple's 136 * OF device tree on some Grackle-based hardware can also miss 137 * functions on multi-function cards. 138 */ 139 140 ofw_pcibus_enum_bus(dev, domain, busno); 141 142 return (bus_generic_attach(dev)); 143 } 144 145 static void 146 ofw_pcibus_enum_devtree(device_t dev, u_int domain, u_int busno) 147 { 148 device_t pcib; 149 struct ofw_pci_register pcir; 150 struct ofw_pcibus_devinfo *dinfo; 151 phandle_t node, child; 152 u_int func, slot; 153 int intline; 154 155 pcib = device_get_parent(dev); 156 node = ofw_bus_get_node(dev); 157 158 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 159 if (OF_getprop(child, "reg", &pcir, sizeof(pcir)) == -1) 160 continue; 161 slot = OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi); 162 func = OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi); 163 164 /* Some OFW device trees contain dupes. */ 165 if (pci_find_dbsf(domain, busno, slot, func) != NULL) 166 continue; 167 168 /* 169 * The preset in the intline register is usually bogus. Reset 170 * it such that the PCI code will reroute the interrupt if 171 * needed. 172 */ 173 174 intline = PCI_INVALID_IRQ; 175 if (OF_getproplen(child, "interrupts") > 0) 176 intline = 0; 177 PCIB_WRITE_CONFIG(pcib, busno, slot, func, PCIR_INTLINE, 178 intline, 1); 179 180 /* 181 * Now set up the PCI and OFW bus layer devinfo and add it 182 * to the PCI bus. 183 */ 184 185 dinfo = (struct ofw_pcibus_devinfo *)pci_read_device(pcib, 186 domain, busno, slot, func, sizeof(*dinfo)); 187 if (dinfo == NULL) 188 continue; 189 if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, child) != 190 0) { 191 pci_freecfg((struct pci_devinfo *)dinfo); 192 continue; 193 } 194 pci_add_child(dev, (struct pci_devinfo *)dinfo); 195 196 /* 197 * Some devices don't have an intpin set, but do have 198 * interrupts. These are fully specified, and set in the 199 * interrupts property, so add that value to the device's 200 * resource list. 201 */ 202 if (dinfo->opd_dinfo.cfg.intpin == 0) { 203 ofw_pci_intr_t intr[2]; 204 phandle_t iparent; 205 int icells; 206 207 if (OF_getprop(child, "interrupts", &intr, 208 sizeof(intr)) > 0) { 209 iparent = 0; 210 icells = 1; 211 OF_getprop(child, "interrupt-parent", &iparent, 212 sizeof(iparent)); 213 OF_getprop(iparent, "#interrupt-cells", &icells, 214 sizeof(icells)); 215 216 if (iparent != 0) 217 intr[0] = MAP_IRQ(iparent, intr[0]); 218 219 if (iparent != 0 && icells > 1) { 220 powerpc_config_intr(intr[0], 221 (intr[1] & 1) ? INTR_TRIGGER_LEVEL : 222 INTR_TRIGGER_EDGE, 223 INTR_POLARITY_LOW); 224 } 225 226 resource_list_add(&dinfo->opd_dinfo.resources, 227 SYS_RES_IRQ, 0, intr[0], intr[0], 1); 228 } 229 } 230 } 231 } 232 233 /* 234 * The following is an almost exact clone of pci_add_children(), with the 235 * addition that it (a) will not add children that have already been added, 236 * and (b) will set up the OFW devinfo to point to invalid values. This is 237 * to handle non-enumerated PCI children as exist in FDT and on the second 238 * function of the Rage 128 in my Blue & White G3. 239 */ 240 241 static void 242 ofw_pcibus_enum_bus(device_t dev, u_int domain, u_int busno) 243 { 244 device_t pcib; 245 struct ofw_pcibus_devinfo *dinfo; 246 int maxslots; 247 int s, f, pcifunchigh; 248 uint8_t hdrtype; 249 250 pcib = device_get_parent(dev); 251 252 maxslots = PCIB_MAXSLOTS(pcib); 253 for (s = 0; s <= maxslots; s++) { 254 pcifunchigh = 0; 255 f = 0; 256 DELAY(1); 257 hdrtype = PCIB_READ_CONFIG(pcib, busno, s, f, PCIR_HDRTYPE, 1); 258 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE) 259 continue; 260 if (hdrtype & PCIM_MFDEV) 261 pcifunchigh = PCI_FUNCMAX; 262 for (f = 0; f <= pcifunchigh; f++) { 263 /* Filter devices we have already added */ 264 if (pci_find_dbsf(domain, busno, s, f) != NULL) 265 continue; 266 267 dinfo = (struct ofw_pcibus_devinfo *)pci_read_device( 268 pcib, domain, busno, s, f, sizeof(*dinfo)); 269 if (dinfo == NULL) 270 continue; 271 272 dinfo->opd_obdinfo.obd_node = -1; 273 274 dinfo->opd_obdinfo.obd_name = NULL; 275 dinfo->opd_obdinfo.obd_compat = NULL; 276 dinfo->opd_obdinfo.obd_type = NULL; 277 dinfo->opd_obdinfo.obd_model = NULL; 278 279 /* 280 * For non OFW-devices, don't believe 0 281 * for an interrupt. 282 */ 283 if (dinfo->opd_dinfo.cfg.intline == 0) { 284 dinfo->opd_dinfo.cfg.intline = PCI_INVALID_IRQ; 285 PCIB_WRITE_CONFIG(pcib, busno, s, f, 286 PCIR_INTLINE, PCI_INVALID_IRQ, 1); 287 } 288 289 pci_add_child(dev, (struct pci_devinfo *)dinfo); 290 } 291 } 292 } 293 294 static int 295 ofw_pcibus_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 296 size_t buflen) 297 { 298 pci_child_pnpinfo_str_method(cbdev, child, buf, buflen); 299 300 if (ofw_bus_get_node(child) != -1) { 301 strlcat(buf, " ", buflen); /* Separate info */ 302 ofw_bus_gen_child_pnpinfo_str(cbdev, child, buf, buflen); 303 } 304 305 return (0); 306 } 307 308 static int 309 ofw_pcibus_assign_interrupt(device_t dev, device_t child) 310 { 311 ofw_pci_intr_t intr; 312 phandle_t node, iparent; 313 int isz; 314 315 node = ofw_bus_get_node(child); 316 317 if (node == -1) { 318 /* Non-firmware enumerated child, use standard routing */ 319 320 /* 321 * XXX: Right now we don't have anything sensible to do here, 322 * since the ofw_imap stuff relies on nodes having a reg 323 * property. There exist ways around this, so the ePAPR 324 * spec will need to be studied. 325 */ 326 327 return (PCI_INVALID_IRQ); 328 329 #ifdef NOTYET 330 intr = pci_get_intpin(child); 331 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, 332 intr)); 333 #endif 334 } 335 336 /* 337 * Try to determine the node's interrupt parent so we know which 338 * PIC to use. 339 */ 340 341 iparent = -1; 342 if (OF_getprop(node, "interrupt-parent", &iparent, sizeof(iparent)) < 0) 343 iparent = -1; 344 345 /* 346 * Any AAPL,interrupts property gets priority and is 347 * fully specified (i.e. does not need routing) 348 */ 349 350 isz = OF_getprop(node, "AAPL,interrupts", &intr, sizeof(intr)); 351 if (isz == sizeof(intr)) 352 return ((iparent == -1) ? intr : MAP_IRQ(iparent, intr)); 353 354 isz = OF_getprop(node, "interrupts", &intr, sizeof(intr)); 355 if (isz == sizeof(intr)) { 356 if (iparent != -1) 357 intr = MAP_IRQ(iparent, intr); 358 } else { 359 /* No property: our best guess is the intpin. */ 360 intr = pci_get_intpin(child); 361 } 362 363 /* 364 * If we got intr from a property, it may or may not be an intpin. 365 * For on-board devices, it frequently is not, and is completely out 366 * of the valid intpin range. For PCI slots, it hopefully is, 367 * otherwise we will have trouble interfacing with non-OFW buses 368 * such as cardbus. 369 * Since we cannot tell which it is without violating layering, we 370 * will always use the route_interrupt method, and treat exceptions 371 * on the level they become apparent. 372 */ 373 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, intr)); 374 } 375 376 static const struct ofw_bus_devinfo * 377 ofw_pcibus_get_devinfo(device_t bus, device_t dev) 378 { 379 struct ofw_pcibus_devinfo *dinfo; 380 381 dinfo = device_get_ivars(dev); 382 return (&dinfo->opd_obdinfo); 383 } 384 385